for (LoadingCache<Object, Object> cache : caches()) {
      Set<Entry<Object, Object>> entries = cache.asMap().entrySet();
      assertThrows(
          NullPointerException.class, () -> entries.toArray((Entry<Object, Object>[]) null));
      checkEmpty(cache);
    }
  }

  public void testEntrySet_addNotSupported() {
    for (LoadingCache<Object, Object> cache : caches()) {
      assertThrows(

  public void testAsMap() {
    CacheBuilder<Object, Object> builder = createCacheBuilder();
    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertThat(cache.stats()).isEqualTo(EMPTY_STATS);

    Object one = new Object();
    Object two = new Object();
    Object three = new Object();

    ConcurrentMap<Object, Object> map = cache.asMap();
    assertThat(map.put(one, two)).isNull();

                                "type": "object",
                                "title": "Tags",
                                "default": {},
                            },
                        },
                    },
                    "ModelB": {
                        "title": "ModelB",
                        "required": ["username"],
                        "type": "object",
                        "properties": {

	AmzFwdHeaderLastModified       = "x-amz-fwd-header-Last-Modified"

	AmzFwdHeaderObjectLockMode        = "x-amz-fwd-header-x-amz-object-lock-mode"
	AmzFwdHeaderObjectLockLegalHold   = "x-amz-fwd-header-x-amz-object-lock-legal-hold"
	AmzFwdHeaderObjectLockRetainUntil = "x-amz-fwd-header-x-amz-object-lock-retain-until-date"
	AmzFwdHeaderMPPartsCount          = "x-amz-fwd-header-x-amz-mp-parts-count"

//       purge:
//           # retainVersions: 0 # (default) delete all versions of the object. This option is the fastest.
//           # retainVersions: 5 # keep the latest 5 versions of the object.
//
//     - type: deleted # objects with delete marker as their latest version
//       name: NAME # match object names that satisfy the wildcard expression.
//       olderThan: 10h # match objects older than this value (e.g. 7d10h31s)

public final class CollectorTester<
    T extends @Nullable Object, A extends @Nullable Object, R extends @Nullable Object> {
  /**
   * Creates a {@code CollectorTester} for the specified {@code Collector}. The result of the {@code
   * Collector} will be compared to the expected value using {@link Object#equals}.
   */
  public static <T extends @Nullable Object, A extends @Nullable Object, R extends @Nullable Object>

		}
	}

	// since majority of xl.meta's are not available, object should be successfully deleted.
	_, err = objLayer.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
	if _, ok := err.(ObjectNotFound); !ok {
		t.Errorf("Expect %v but received %v", ObjectNotFound{Bucket: bucket, Object: object}, err)
	}

  /** Test proper handling where an object incorrectly tests for an incompatible class */
  public void testInvalidEqualsIncompatibleClass() {
    Object obj = new InvalidEqualsIncompatibleClassObject();
    equalsTester.addEqualityGroup(obj);
    try {
      equalsTester.testEquals();
    } catch (AssertionFailedError e) {
      assertErrorMessage(
          e, obj + " must not be Object#equals to an arbitrary object of another class");

  }

  static <R extends @Nullable Object, C extends @Nullable Object, V extends @Nullable Object>
      Table<R, C, V> table(Table<R, C, V> table, @Nullable Object mutex) {
    return new SynchronizedTable<>(table, mutex);
  }

  static final class SynchronizedTable<
          R extends @Nullable Object, C extends @Nullable Object, V extends @Nullable Object>
      extends SynchronizedObject implements Table<R, C, V> {

  }

  static <R extends @Nullable Object, C extends @Nullable Object, V extends @Nullable Object>
      Table<R, C, V> table(Table<R, C, V> table, @Nullable Object mutex) {
    return new SynchronizedTable<>(table, mutex);
  }

  static final class SynchronizedTable<
          R extends @Nullable Object, C extends @Nullable Object, V extends @Nullable Object>
      extends SynchronizedObject implements Table<R, C, V> {